環境
- Ubuntu 16.04
インストール
apt install cpufrequtils
確認
cpufreq-infoコマンドを使う
# cpufreq-info
cpufrequtils 008: cpufreq-info (C) Dominik Brodowski 2004-2009
Report errors and bugs to cpufreq@vger.kernel.org, please.
analyzing CPU 0:
driver: intel_pstate
CPUs which run at the same hardware frequency: 0
CPUs which need to have their frequency coordinated by software: 0
maximum transition latency: 0.97 ms.
hardware limits: 1.60 GHz - 3.40 GHz
available cpufreq governors: performance, powersave
current policy: frequency should be within 1.60 GHz and 3.40 GHz.
The governor "powersave" may decide which speed to use
within this range.
current CPU frequency is 2.55 GHz (asserted by call to hardware).
(↑がCPUの数だけ表示される)
ズラズラ表示されるが、主に抑えるポイントは以下
- 最小周波数は1.60 GHz
- 最大周波数は3.40 GHz
- 現在のガバナーはpowersave
- 利用可能なガバナーはperformance, powersave
シンプルに表示したければ以下
cpufreq-info -p 1600000 3400000 powersave
ガバナーを設定
cpufreq-set -g powersave
